Adhesive Laminate Structure for Moist Wound Contact and Easy Removal

Solution Overview

Problem

Existing wound dressings often cause trauma to the wound or surrounding skin during removal due to adherence to dry skin, and there is a need for a versatile skin contact layer that maintains moisture over the wound while providing adhesion.

Innovation Solution

A releasably adhesive laminate comprising a structural layer with a hydrophobic gel on one side and a pressure-sensitive adhesive on the other, which can be integrated into various dressings to maintain wound moisture and facilitate easy removal without causing trauma.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a pressure-sensitive adhesive layer is used to maintain dressing position, then adhesion to skin is improved, but trauma to peri-wound skin during removal occurs

Engineering Contradiction:

Improveadhesion strengthVSAvoidskin trauma

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The dressing is segmented into distinct functional zones: a central non-adherent wound contact area and a peripheral adhesive retention border. This segmentation allows the adhesive to secure the dressing without requiring the entire wound contact surface to adhere, thereby preventing trauma to the wound bed while maintaining positioning through the border region.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the dressing have different adhesive properties: the wound contact layer is non-adherent or low-adherent to prevent trauma, while the peripheral border has enhanced adhesive properties for secure retention. This local differentiation of adhesive quality allows simultaneous achievement of pain-free removal and reliable positioning.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If the wound contact layer is made non-adherent to prevent trauma, then ease of removal is improved, but adhesion to dry skin is reduced

Engineering Contradiction:

Improveease of removalVSAvoidadhesion to skin

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The dressing is segmented into distinct functional zones: a central non-adherent wound contact area and a peripheral adhesive retention border. This segmentation allows the adhesive to secure the dressing without requiring the entire wound contact surface to adhere, thereby preventing trauma to the wound bed while maintaining positioning through the border region.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the dressing have different adhesive properties: the wound contact layer is non-adherent or low-adherent to prevent trauma, while the peripheral border has enhanced adhesive properties for secure retention. This local differentiation of adhesive quality allows simultaneous achievement of pain-free removal and reliable positioning.

Inventive Principle:

Principle #3Local quality

3Reliability

If the wound contact layer maintains moisture over the wound, then wound protection is improved, but adhesion to surrounding skin is reduced

Engineering Contradiction:

Improvewound protectionVSAvoidadhesion strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

Different regions of the dressing have different adhesive properties: the wound contact layer is non-adherent or low-adherent to prevent trauma, while the peripheral border has enhanced adhesive properties for secure retention. This local differentiation of adhesive quality allows simultaneous achievement of pain-free removal and reliable positioning.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The peripheral adhesive border acts as an intermediary element that provides adhesion to the skin without requiring the wound contact layer to adhere. This mediator function allows the moist wound contact layer to protect the wound while the separate adhesive border maintains dressing position.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The laminate allows for pain-free dressing removal, maintains wound moisture, and can be integrated into various dressings to enhance their functionality, including absorbency and ease of application and repositioning.

Implementation Method 1

a hydrophobic gel on one side

Methodology Applied

Scientific EffectHydrophobic effect: Hydrophobe

Implementation Method 2

a pressure-sensitive adhesive on the other

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS20260069741A1Adhesive laminates and applications thereof

Publication Date: 2026.03.12 BRIGHTWAKE

AI summary

A releasably adhesive laminate (1) comprises a structural layer (2) carrying on at least part of one side thereof a hydrophobic gel (4) and on at least part of the other side thereof a pressure-sensitive adhesive (3). The structural layer (2) is preferably a film of synthetic plastics material, eg polyurethane. The pressure-sensitive adhesive (3) is preferably an acrylic adhesive, and the hydrophobic gel (4) is preferably a silicone gel. The laminate (1) may be used as a skin contact component of a wound dressing or in numerous other applications.